l16 - ShieldScript

using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;

public class ShieldScript : MonoBehaviour
{

    int life = 3; //number of hits
    Renderer rend; //connection to the Renderer component

    void Start()
    {
        rend = GetComponent<Renderer>();
    }

    void OnTriggerEnter2D(Collider2D other)
    {
        //If the shield touches the alien itself, it will be completely destroyed
        if (other.gameObject.tag == "Alien")
        {
            Destroy(gameObject);
        }

        //If it touches the projectile, the projectile will be destroyed and it will also reduce the durability of the shield
        if (other.gameObject.tag == "AlienBullet")
        {
            Destroy(other.gameObject);
            ChangeLife();
        }

    }


    void ChangeLife()
    {
        //We define the next states that the colors will have
        Color[] col = { Color.red, Color.green, Color.blue };

        //lower the number of hits
        life--;

        //If we go below 0
        if (life < 0)
        {
            //the shield is destroyed
            Destroy(gameObject);
            //end the method
            return;
        }
        //change the state
        rend.material.color = col[life];

    }
}